Carrier for electromagnetic pick-up



L. F. CURTIS Dec. 20, 1932.

CARRIER FOR ELECTROMAGNETIC PICK-UP Filed Aug. 23, 1929 INVENTOR ZzszzzF WW5 ATTORNEY Patented Dec. 20, 1932 UNITED STATES MAGNETO CORPORATION,OF SPRINGFIELD,

NEW YORK PATENT oFFIcET-f' LESLIE r. CURTIS, or SPRINGFIELD,MASSACHUSETTS, AssIGivon T AMERICAN noscir Application filed August 2 3,1929. SrialNo. 387,842.

gitudinally with respect to said support, said arm being pivotallymounted on and rotatable with respect to said support.

Though the accompanying drawing shows the preferred embodiment of thisinvention, the invention may take other forms which are within theprinciple and scope thereof.

Fig. 1 shows the usual disposition of the electromagnetic pickup devicewithin the playing compartment of a phonograph; Fig.

' 2 is a detail, partly in section, of the support and arm; Fig. 3 is across section through 3-3 of Fig. 2; and Fig. 4 is a detail showing theyoke which supports the arm.

Throughout the drawing like reference characters indicate like parts.

Fig. 1 illustrates a phonograph cabinet 1,

its turntable 2 and tone arm 3. Disposed within said cabinet, as shown,is the electromagnetic pickup device comprising the electromagneticpickup 4., the arm 5, support 6 (indicated generally), volume control 7,and socket plug 8.

The sub]ect of this invention concerns only the construction of thesupport 6 and arm 5, the two being called also, for convenience, thecarrier for the electromagnetic pickup 4..

The support 6 comprises a base 9 into which is inserted the rod ormember 10 having a longitudinal groove 11 and a transverse hole 12 intowhich is permanently secured an arcuate-shaped spring element 13. Aconvenient way of securing the spring to said rod is by peening over 14,the metal of the rod, at the sides of the groove.

The function of the spring is to exert a ible yoke 16 hearing internallyopposed pins 17, 17, which are adaptedto engage-with perelementstherein.

MASSACHUSETTS, A conronnrlolv'on yielding pressure between the inside ofthe base and the rodso as to avoid'rattle between the parts when inoperation. Mounted on saidrod byqa rivet 1 5 forations 18 in the arm 5and collar 19. I

The arm may or may not be perforated, if the collar is; and thecollar'may bedispensed with and perforations provided inl'the arm.-

In any case the function'and coact-ion of the elements is the same. VThe perforations are axially alined an permit the arm to be supported.at any one or another of points along saidaxi's. This per-.

phonograph cabinet or arrangement of: the' Thebase 9 is provided with anopening in the bottom thereof which is adapted to rebe secured to thecabinet.

At the unsupported end of the arm is mounted a bracket 21 to which isattached the electromagnetic pickup.

claim 1s:

1. A carrier for electromagnetic pickups comprising a base, a rotatableyoke mounted thereon having opposed pins, and an arm mits the device tobe adjusted to any sizev of ceive a screw 20, whereby the support mayHaving described my invention, what I having depressions along itslength engageable by said pins to provide means for adj usting the pointof support of said arm.

2. carrier for electromagnetic pickups comprzsing a base, a rotatablerod mounted therein, a yoke mounted thereon having opposed pins, and anarm having depressions along its length engageable by said pins toprovide means for adjusting the point of support.

3. A carrier for electromagnetic pickups comprising a base, a rotatablerod mounted therein, a yielding element between said rod and base, ayoke mounted on said rod having opposed pins, and an arm havingdepressions along its length engageable by said pins.

4. A carrier for electromagnetic pickups comprising a base, a rotatablerod mounted therein, a spring carried by said rod and in;v

yielding frictional engagement between said base and rod, a yoke mountedon said rod having opposed pins, and an arm having depressions along itslength engageable by said pins.

5. A carrier for electromagnetic pickups comprising a base, a rotatablemember mounted therein, a yielding element offering frictionalengagement between said member and base, an armpivotally mounted on saidmember having a collar with axially alined perforations, and meanscarried by said member to engage said perforations.

6. A carrier for electromagnetic pickups comprising a base, a rotatablemember mounted therein, a spring carried by said member and inyieldingly frictional engagement between said base and member, an armpivotally mounted on said member having a collar with axially alinedperforations, and

means carried by said member to engage said perforations.

-7. carrier for electromagnetic pickups comprising a base, a rotatablemember mounted therein, a spring carried by said member and inyieldingly frictional engagement between said base and member, an armpivotally mounted on said member havlng a collar with axially alinedperforations, i

means carried by said member to engage said perforations, and a bracketmounted onsaid arm-to hold the pickup.

In testimony whereof I aflix my signature.

LESLIE F. CURTIS.

